diff --git a/src/main.c b/src/main.c
index 245c344e..1362108e 100644
--- a/src/main.c
+++ b/src/main.c
@@ -160,7 +160,7 @@ int main(int argc, char *argv[])
 
     atexit(exitfunc);
 
-    if (DoCalendar || (DoSimpleCalendar && (!NextMode || PsCal))) {
+    if (IsCalendarMode()) {
         ProduceCalendar();
         return 0;
     }
diff --git a/src/protos.h b/src/protos.h
index 45305211..d2c3b2eb 100644
--- a/src/protos.h
+++ b/src/protos.h
@@ -35,6 +35,8 @@
 #define isempty(c) (isspace(c) || ((c) == '\\'))
 
 #define IsServerMode() (Daemon < 0)
+#define IsCalendarMode() (DoCalendar || (DoSimpleCalendar && (!NextMode || PsCal)))
+
 #define ShouldFork (!DontFork)
 
 #include "dynbuf.h"